Three-way cap pin-type socket



Oct. 11, 192 7.

1,645,240 w. ILE v THREE-WAY CAP PI N TYPE SOCKET Filed Aug. 18. 1925 3Sheets-Sheet 1 g M m 1 I 5/ f i 4.3 il l 1 i I W. ILE

THREE-WAY CAP PIN TYPE SOCKET Filed Aug. 18. 1925 3 Sheets-Sheet 2 IN VENTOR.

, a 1645,2 46 Oct, 11,1927. WJLE I THREE-WAY CAP PIN TYPE SOCKET FiledAug. 18. 1925 3 Sheets-Sheet 3 gwwnto'c Wail am [6'6 Patented Oct. 11,1927.

UNITED STATES 1,645,240 PATENT OFFICE.

WILLIAM ILE, OF JACKSON, MICHIGAN, ASSIGNOR T0 REYNOLDS SPRING COMiPANY,OF JACKSON, MICHIGAN, A CORPORATION OF DELAWARE.

THREIPWAY CAI PIN-TYPE SOCKET.-

Application filed August 18, 1925. Serial No. 50,923

' The invention relates to a three way cap pin type socket.

The object of the invention is to provide a simple, practical andefficient three way cap pin type socket of exceedingly light,-

strong, durable and inexpensive construction equipped with a bodyportion of two pieces of molded bakelite or other insulating materialand adapted to receive a removable universal screw plug adapted toengage the ordinary screw socket and detachableto permit the body to beattached to a pin type socket.

A further object of the invention is to provide a three way cap pin typesocket of this character having a spring contact and knife blade or pincontact assembled of exceed-v in ly similarconstruction adapted todistriliute the current equally to three spring contacts and capable ofbeing readily assembled in the body or casing and of being firmly heldin position therein when the parts are assembled. With these and otherobjects in view, the

l invention consists in the construction and accompanying drawings andpointed out in the claims hereto appended, it being understoodthatvarious changes in the form, proportion and minor details ofconstruction, within the scope of the claims, may be resorted to withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

In the drawings:

Figure 1 is a front elevation of a three way cap pin type socketconstructed in accordance with this invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is a plan view of the three way cap pin type socket, the screwplug being removed.

Fig. 4 is a central vertical longitudinal sectional view of the device.

Fig. 5 is a central transverse sectional view of the same.

Fig. 6 is a horizontal sectional view taken substantially on the line66' of Fig. 4.

Fig. 7 is a plan view of a removable bottom plate or section of thebody.

Fig. 8 is a plan view of one of the removable pin caps showing the innerface of the same. I

Fig. 9 is a reverse plan view 01' the body consisting ofha-gshell orhollow casing of molded Bakelite or other suitable insulating materialof approximately cylindrical form open at the bottom and providedthereat with a removable bottom plate or section 2 and having asubstantially cylindrical compartment 3. The bottom plate or section 2is substantially rectangular as clearly illustrated in Fig. 7 of thedrawings and it is provided with opposite segmental compartments 4having parallel inner straight edges and having outer curved edgesforming por-' tions of a circle of the same diameter as the cylindricalchamber 3 and fitting within the same and forming a firm connection withthe open lower end of the hollow body or casing and interlocking theparts against relative lateral or horizontal movement. The parts areinterlocked together against rela tive rotary movement by means of lugslocated at and projecting upwardly from the central portions of thecurved edges of the enlargements 5 and fitting in lower recesses 6formed in two of the opposite walls of the body at the inner faces ofthe same as clearly shown in Fig. 4 of the drawings. The removablebottom plate is securely fastened to the body by means of a verticalscrew 7 passing through an opening 8 in the center of the bottom plateand engagin the lower portion of an interiorly threaded metallic bushing9 molded in the top wall of the body. The bottom plate is provided witha central rectangular boss 10 forming an enlargement at the centralportion of the said plate and thickening the said central portion andproviding sufficient thickness to permit the central opening 8 tr beenlarged at the lower portion to receive the head of the screw 7.

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The bushing is molded in the top wall of the body and the upper end ofthe screw is threaded to engage the bushing. The upper portion of thebushing receives the lower threaded end of an upper vertical screw 11which detachably secures a universal screw plug upon the top of the bodyfor engaging a screw socket.

The screw plug consists of a base 12 of in- .sulating material, an outerdisk 13 of the same material and a metallic screw shell 14 constructedof suitable conducting material. The base 12 and disk 13 of the screwplug .are designed to be molded of bakelite or other suitable materialand the disk 13 is provided with. a smooth metallic bushing 15 molded inthe disk 13 and formin a pasconstructed of suitable conducting materialand having their upper portions bent at right angles to form arms 18 and19. The

arm 18 extends through the slot 20 in the top flange or portion 21 ofthe metallic shell 14 and is held .between the flange or portion 21 andthe disk 13 in a depression of the said flange 21. The arm 19 of theother contact of the plug is secured to the inner end of the metallic buing 15 by heading the lower end of the bu hing.- \The bushing is adaptedto be spun outwardlyto engage the arm 19 of the contact 17 but it may beheaded or riveted in any other desired manner. The bushing 15 1sprovided at its outer end with an .outturned flange 22 for engaging thedisk 13 and it may be molded in the disk or appliedthereto in any otherdesired manner as will be readily understood. The base 12 of the screwplug is provided with a depending annular flange 23 which tits in acircumferential groove 24 in the top wall of the body.

The contacts 16 and 17 which are resilient;

and which have divergin lower terminals are engaged by upper knife bladeportions or terminals 25 of vertical conductor bars 26 constructed ofbrass or other suitable conducting material and each having its lowerportion outwardly offset from the vertical plane of the upper portion bymeans of a horizontal intermediate portion 27. The conductor bar isangularly bent at right angles in opposite directions to form theintermediate portion 27 which fits against the lower face of the topwall of the body when the parts are assembled as clearly illustrated inFig. 5 of the drawings and the lower ends of the conductor bars fit inrecesses 28 in the upper face of the bottom plate 2 of the body atopposite ends of the space between the segmental enlargements 5 thereof.The recesses 28 form seats for the lower ends of the conductor bars andwhen the parts are assembled the conductor bars are firmly held betweenthe top wall and the bottom plate and the recesses also prevent anylateral movement of the lower ends of the conductor bars so that therewill be no liability of dislod 'ng the conductor bars and horizontal anvertical contact sprin s 29 and 30 there of when contacts are ma e andbroken between contacts of side and bottom pin type caps 31 and 32. Thecontact springs 29 and 30 are constructed of phosphor bronze or othersuitable conducting material and the said horizontal springs consisteach of a single strip of metal bent inwardly at points equidistantfrointhe center of the strip to form approximately U-shaped springcontact ortions as clearly shown in Fig. 6 of the rawings. The verticalspring 30 'consists of a sin le strip of metal bent into U-sha e andaving' one of its sides extende and crossing the central portion of theadjacent horizontal spring contacts and secured to the same and to theadjacent vertical conductor bar 26 by means of a rivet 33 or othersuitable fastening means. The inner side of the vertical contact spring30 fits againstthe lower portion of the conductorbar to which itisattached and it is interposed between the same and the central portionof the horizontal spring. contacts 29 carried by the said conductor bar.The body 1 is provided at opposite sides of the cylindrical chamberor"compartment 3 with vertical grooves 34 extending upwardly from thelower edges of the body 1 to horizontal slots 35 through which knifecontacts 36 of the side caps 31 extend to engage the horizontal springcontacts. The bottom plate is provided with slots 37 through which passknife contacts 38 of the bottom pin cap 32.

The upper portions 25 of the conductor bars 26 extend above the top wallof the body and are adapted to fit in a pin socket or other receptacleorfixture when the screw plug is removed and the are provided ad- '1jacent their upper bevele ends with counter sunk openin s 39 adapted toreceive protuberances 0 contacts of such receptacles or fixtures. Thehorizontal and vertical spring contacts are provided at their outersides with protuberances 40 formed by indenting the metal from the innerface of the same and adapted to engage with the contacts of the pin caps31 and 32, which are also provided with countersunk perforations 41 toreceive the protuberances 40 and thereby form an interlockin connectionbetween the contacts. Each 0 the in caps are provided with a pair ofspaced contacts located at opposite sides ofa central opening 42 forminga passage for the wires 43 as clearly indicated in Fig. 1 of thedrawings. Each of the contacts of the pin caps is constructed of brassor other suitable conducting material and is oppositely beveled at theouter ing a closure for the bottom provided with spaced recesses andslots, a

end and the other end is formed integral with a curved attaching plate44 secured by a rivet 45 or other suitable fastening means to the innerface of the cap to which it'is ap lied and fitted in a recess 46 in thesame and provided with a terminal lug 47 which is interlocked with thepin cap. The attaching plate 44 is also provided with a binding screw 48for the attaching of the end of the wire to the attachment plate intheusual manner. The contacts 36 and 38 engage with the three sides ofthe horizontal and vertical contact springs and the pin caps are adaptedto be removed and replaced without displacing the contact springs orthezconductor bars. The contact spriiigs 29 and 30 and the conductorbars form a simple and compact assembly and are adapted to be readilinserted in the hollow body through the grooves 34 and they are firmlyheld in position when the parts are assembled.

The body is provided with circular enlargements 49 to receive the sidepin caps and the enlargements and the bottom plate are provided betweentheir slots with curved connecting grooves 50 and 51 for guiding thecontacts of the removable caps into the slots.

What is claimed:

1. A cap pin type socket including a hollow body open at the bottom andprovided at the top and sides with spaced slots, a double interiorlythreaded bushing extending through the top wall of the body, a screwplug mounted upon the top of the body and composed of separable partsand provided with a screw connecting the parts of the screw plug andenga 'ng the upper portion of the bushing an securin the screw plug tothe body, a bottom plate ormof the body and screw extending through thebottom plate and engaging the lower portion of the bushing, verticalconductor bars mounted at the lower end in the recesses of the closureplate and provided intermediate of their ends With angular portionsforming shoulders fitted against the top Wall of the body, saidconductor bars being clamped between the bottom plate and the top wall,the upper portions of the conductorbars extending through the top wallinto the screw plug and spring contacts carried by the conductor bars,and located at the side slots and at the sides of the bottom plate. 2; Acap pin type socket including a body 'open at the bottom and having asubstantially cylindrical compartment and provided at opposite sidesthereof with grooves and having horizontal slots communicating with thegrooves at the upper portions thereof, said grooves being arranged inpairs, a bottom plate forming a closure for the compartment and securedto the body and provided with opposite recesses located between thegrooves of the body, conductor bars mounted betweenthe top wall of thebody and the bottom plate and having their lower terminals fitted in therecesses, said conductor bars being provided with horizontal andvertical spring contacts, the horizontal contacts extending into thevertical grooves which permit the conductor bars and the spring contactsto be assembled through the open bottom of the bod said bottom platebeing provided with slots located in line with the vertical springcontacts and the horizontal spring contacts being arranged in line withthe slots of the body.

In testimony whereof I have hereunto set my hand.

WILLIAM ILE.

